All Terramar® Thermasilks come with the EC2® Qwik-DriTM Electrostatic process which has the ability to actually lift the moisture molecules away from the body and break them down for rapid evaporation. This patented process does not involve the use of add-on chemicals but is a permanent molecular change in the silk fibers. Since the EC2® Qwik-DriTM process alters the molecular signature of the yarn in our fabric, the moisture control is permanent. It won't wash out or wear off. Content: 80% Spunsilk / 20% Lambswool Waffleweave EC2® Qwik-DriTM |